So the new system is going in our Axis this weekend. Ended up ordering a pro 485, Syn 4, XS-12 and a 420. The tower set up is going to be a hybrid set up with the pro 485 and 2 of the factory MTX speakers. Eventually (next spring most likely) the MTX speakers will get replaced with another 485. I talked to Tim at Wet Sounds a bunch before ordering this system and it should sound pretty good until we finish the upgrade next year. Anyways my question is do we need to replace the factory speaker wire that runs to the MTX tower speakers we are going to replace? My brother is worried that it won't be big enough to handle the 400w that will be going to the 485. (personally I think it will be fine) Thoughts?